Update project License headers and checking (#596)

Update license header to standard format for source files missed prior.

Add license header to new source files.

Add Makefile check to test all `*.go` and `*.sh` files have a copyright
notice (or comment about them being auto-generated) within the first few
lines.

Makefile

@@ -1,3 +1,17 @@
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 EXAMPLES := $(shell ./get_main_pkgs.sh ./example)
 TOOLS_MOD_DIR := ./tools
 
@@ -51,7 +65,7 @@ test-with-coverage:
 	done
 
 .PHONY: ci
-ci: precommit check-clean-work-tree test-with-coverage test-386
+ci: precommit check-clean-work-tree license-check test-with-coverage test-386
 
 .PHONY: check-clean-work-tree
 check-clean-work-tree:
@@ -118,3 +132,13 @@ lint: $(TOOLS_DIR)/golangci-lint $(TOOLS_DIR)/misspell
 
 generate: $(TOOLS_DIR)/stringer
 	PATH="$(TOOLS_DIR):$${PATH}" go generate ./...
+
+.PHONY: license-check
+license-check:
+	@licRes=$$(for f in $$(find . -type f \( -iname '*.go' -o -iname '*.sh' \) ! -path './vendor/*') ; do \
+	           awk '/Copyright The OpenTelemetry Authors|generated|GENERATED/ && NR<=3 { found=1; next } END { if (!found) print FILENAME }' $$f; \
+	   done); \
+	   if [ -n "$${licRes}" ]; then \
+	           echo "license header checking failed:"; echo "$${licRes}"; \
+	           exit 1; \
+	   fi

api/correlation/context.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

api/correlation/doc.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

api/correlation/map.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

api/correlation/map_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

api/metric/must.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

example/grpc/api/hello-service.proto

@@ -1,4 +1,4 @@
-// Copyright 2019, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

example/http/server/modd.conf

@@ -1,3 +1,17 @@
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # A basic modd.conf file for Go development.
 
 # Run go test on ALL modules on startup, and subsequently only on modules

example/zipkin/main.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

exporters/otlp/alignment_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

exporters/otlp/connection.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

exporters/otlp/doc.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

exporters/otlp/example_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

exporters/otlp/internal/transform/metric.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

exporters/otlp/internal/transform/metric_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

exporters/otlp/internal/transform/resource_test.go

@@ -1,3 +1,17 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package transform
 
 import (

exporters/otlp/internal/transform/span_test.go

@@ -1,3 +1,17 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package transform
 
 import (

exporters/otlp/mock_collector_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

exporters/otlp/options.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

exporters/otlp/otlp.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

exporters/otlp/otlp_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

plugin/othttp/filters/filters.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

plugin/othttp/filters/filters_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

plugin/othttp/filters/header_go14.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

plugin/othttp/filters/header_nongo14.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

sdk/export/metric/metric.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

sdk/export/metric/metric_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

sdk/internal/state_locker.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

sdk/metric/aggregator/histogram/histogram.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

sdk/metric/aggregator/histogram/histogram_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

sdk/metric/histogram_stress_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

sdk/metric/minmaxsumcount_stress_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

sdk/metric/refcount_mapped.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

sdk/metric/stress_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

sdk/resource/resource.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

sdk/resource/resource_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

sdk/resource/resourcekeys/const.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

sdk/trace/sampling_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020, OpenTelemetry Authors
+// Copyright The OpenTelemetry Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.